Characterization of Congregicoccus parvus gen. nov., sp. nov., a novel slow-growing ultramicrobacterium of the phylum Verrucomicrobiota.

ABSTRACT: The bacterial phylum Verrucomicrobiota is a typical representative of challenging-to-culture lineages. Here, we isolated a novel slow-growing Verrucomicrobiota bacterium, designated ASA1T, from garden soil. Phylogenetic analyses suggested that strain ASA1T was affiliated with a novel candidate in the family Alterococcaceae of the class Opitutia (previously Opitutae), exhibiting low 16S rRNA gene sequence identities (<93%) and average nucleotide identity values (<77%) to the closest type strain. Furthermore, average amino acid identity analysis (AAI) showed that ASA1T shares <54% AAI identity with Opitutia representatives, well below the 60-65% genus threshold, supporting its classification as a novel genus. In addition to its genomic characteristics, ASA1T exhibits distinctive morphologica

SUBMITTER: Islam MS 

PROVIDER: S-EPMC12193912 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature